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प्रश्न
Which of the following bases is not present in DNA?
विकल्प
Adenine
Thymine
Cytosine
Uracil
उत्तर
Uracil
Explanation:
Uracil is rarely found in DNA, which could be an evolutionary adaptation to increase genetic stability. This is due to the fact that cytosine can deaminate spontaneously to produce uracil via hydrolytic deamination.
Chemical formula: C4H4N2O2
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संबंधित प्रश्न
Define the following terms:
Nucleotide
What are nucleic acids?
Name the purine bases and pyrimidine bases present in RNA and DNA.
The presence or absence of hydroxyl group on which carbon atom of sugar differentiates RNA and DNA?
In both DNA and RNA, heterocyclic base and phosphate ester linkages are at ____________.
DNA and RNA contain four bases each. Which of the following bases is not present in RNA?
Write the structures of fragments produced on complete hydrolysis of DNA. How are they linked in DNA molecule? Draw a diagram to show pairing of nucleotide bases in double helix of DNA.
Which of the following statements is not true about RNA?
Write two differences between DNA and RNA.
State the functions of RNA and DNA.
